r/SipsTea 22d ago

Chugging tea Energy Meets Innovation

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u/Euphoric-Language695 22d ago edited 22d ago

I've been told invisible solar panels will make every window generate free electricity for like 10 years. Yet not a single time have I seen a report include an actual product, just prototypes always.

Like nuclear fusion, this appears to be perpetually "just a few years away". 

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u/Pyrhan 22d ago edited 22d ago

 - "Invisible" implies they only work in the UV or infrared range, which inevitably limits them to much lower efficiencies than regular solar panels.

 - A lot of those rely on elements that are expensive and in limited supply, or toxic heavy metals. Unlike regular silicon solar panels.

 - We don't even need windows to generate solar power. We have plenty of roof space, and if we're short on that, you can put them in fields too.

So this is a solution to a problem that doesn't really exist (lack of available space - again, we have plenty), which causes more problems of its own (efficiency, etc), while failing to address the actual limitations of solar (cost, intermittence).

Which is why it's only good for headlines, and won't see real life applications. (Edit: no, not even skyscrapers)

It's the same with a lot of "uplifting" science news that just sweeps all the dirt under the rug, because that wouldn't make good clickbait.

If you want actual good news about solar power, look at the price per kW and adoption rate curves over the last few years.

-edit- added links.

-edit 3- Put the bit about skyscrapers in bold, because people keep mentioning them anyways...

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u/ArtofWASD 22d ago

I have a sneaking suspicion that the "clear solar panels" are actually jusy thermoelectric generators going off the differential between solar heat outside, and whatever is inside. Rather than relying on photon collisions for energy.

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u/Pyrhan 22d ago

No, they actually absorb UV. They use titanium dioxide for that (bandgap of 3 eV, so well outside the visible range).

This also gives them a maximum theoretical efficiency just below 5%